What’s Vulnerable › Vulnerabilities

CVE-2019-19344

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-01-21 · updated 2026-06-17
• Weakness: CWE-416

Description

There is a use-after-free issue in all samba 4.9.x versions before 4.9.18, all samba 4.10.x versions before 4.10.12 and all samba 4.11.x versions before 4.11.5, essentially due to a call to realloc() while other local variables still point at the original buffer.

Affected products

• Canonical Ubuntu Linux: 16.04, 18.04, 19.04, 19.10
• openSUSE Leap: 15.1
• Samba: from 4.9.0 before 4.9.18; from 4.10.0 before 4.10.12; from 4.11.0 before 4.11.5 — fixed in 4.10.12, 4.11.5, 4.9.18
• Synology Directory Server: all versions
• Synology DiskStation Manager: 6.2
• Synology Router Manager (SRM): 1.2
• Synology Skynas: all versions

How to fix

Upgrade to a fixed version: Samba 4.10.12, 4.11.5, 4.9.18. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00055.html
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19344
• https://lists.debian.org/debian-lts-announce/2023/09/msg00013.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ACZVNMIFQGGXNJPMHAVBN3H2U65FXQY/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GQ6U65I2K23YJC4FESW477WL55TU3PPT/
• https://security.gentoo.org/glsa/202003-52
• https://security.netapp.com/advisory/ntap-20200122-0001/
• https://usn.ubuntu.com/4244-1/
• https://www.samba.org/samba/security/CVE-2019-19344.html
• https://www.synology.com/security/advisory/Synology_SA_20_01
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00055.html
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19344

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